According to the Tendai monk Genshin's Nijugo Zammai Kisho (Twenty Five Day Samadhi Pledge), the main practice of cultivating nembutsu samadhi was followed by the chanting of the Mantra of Light and the empowerment of sand at the end of the practice. In the Ojoyoshu (Collected Sayings on Birth in the Pure Land) Genshin states, "One who seeks the Land of Bliss does not necessarily focus solely on the nembutsu. Each should abide in the realm of pleasurable ease by illuminating one of the other practices in a sustained manner. For example, there are practices of such dharanis as the Zuigu (Following Desire), Sonsho (Victorious), and [Mantra of] Light of the Unfailing Rope Snare. By receiving, maintaining, invoking, and intoning them, all of which are within the various Mahayana teachings, one may attain birth in [Amida's] Land of Bliss"